(2,4-dimethoxy-s-triazin-6-yl)pyrene monosulphonamide



United States Patent 3,523,945 (2,4-DIMETHOXY-s-TRIAZIN-6-YL)PYRENE MONOSULPHONAMIDE John Mon Evans, Bebington, England, assignor to Lever g lrothers Company, New York, N.Y., a corporation of arm No Drawing. Filed Mar. 21, 1967, Ser. No. 624,728 Claims priority, application (fines; Britain, Mar. 24, 1966, Int. CLC07d 55/36 US. Cl. 260-248 ABSTRACT OF THE DISCLOSURE (2,4-dimethoxy-s-triazin-6-yl) pyrene monosulphonamide, prepared by reacting (2,4-dimethoxy-s-triazin-6- yl) pyrene with chlorosulphonic acid and followed by neutralisation with ammonia, is useful as a fluorescer for nylon and other synthetic materials.

This invention relates to a new fluorescent material which is particularly suitable for the treatment of syn thetic polymers such as nylon.

The new fluorescent material is the snlphonamide derivative of (2,4-dimethoxy-s-triazin-6-yl) pyrene obtained by reaction of this compound with chlorosulphonic acid followed by neutralisation with ammonia. The material is the mono snlphonamide derivative (i.e. one snlphonamide group per molecule) with substitution occurring in the pyrene ring.

The invention provides a compound of the general Formula A PyrentSOzNIh) -OCH:

1 Claim 3,523,945 Patented Aug. 11, 1970 from aqueous systems. For this reason the snlphonamide derivative is better suited than Fluolite XMF for incorporation in detergent compositions such as heavy duty and light duty washing powders.

A further aspect of the invention is the brightening of synthetic polymers such as nylon by the application of the suphonamide derivative.

Another aspect of the invention is a detergent composition containing from 0.01 to 1.0% by weight of the composition of the snlphonamide derivative. When applied to nylon from a detergent solution the sulphonamide derivative builds up to a higher level than does Fluolite XMF and at a higher level imparts a more intense green/yellow colour.

The preparation and properties of the snlphonamide derivative are described in the following example:

Example Fluolite XMF (5 g.) was added slowly with stirring to cool (0 C.) chlorosulphonic acid g.). The reaction mixture was left to stand for 1 hour at room temperature and then poured onto ice. The precipitated solid was filtered off, washed with a little cold water and then added to ammonia solution (25 mL; s.-g. 0.88) and heated on the steam bath for 30 minutes. The solution was poured into water ml.), filtered and the residue washed with water. It was finally dried in vacuum. M.P. 259.

The snlphonamide derivative had the following ultraviolet absorption characteristics kwma) 366-368 28.8

Thin layer chromatography showed the snlphonamide derivative to be substantially pure.

What is claimed is:

1. (2,4-dimethoxy-s-triazin-G-yl) pyrene monosulphonamide.

References Cited UNITED STATES PATENTS 2,325,803 8/1943 Schmidt et al. 260248 2,910,488 10/1959 Novello 260239.6 XR

HENRY R. JILES, Primary Examiner I. M. FORD, Assistant Examiner US. Cl. X.R. 252-301.2 

